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Finding the Fourth Proportional to 330,091.20, 495,136.80 and 328,122.90

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Solution

The fourth proportional to 330,091.20, 495,136.80 and 328,122.90 is: 492,184.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,091.20 : 495,136.80 = 328,122.90 : x
  2. Step 2: Convert to fraction form
    330,091.20/495,136.80 = 328,122.90/x
  3. Step 3: Cross multiply
    330,091.20x = 495,136.80 × 328,122.90
  4. Step 4: Simplify right side
    330,091.20x = 162,465,722,712.72
  5. Step 5: Solve for x
    x = 162,465,722,712.72/330,091.20
  6. Step 6: Final answer
    x = 492,184.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.